Remove unused include (#1220)

Author: bmagyar

ur_robot_driver/include/ur_robot_driver/hardware_interface.hpp

@@ -49,7 +49,6 @@
 #include "hardware_interface/hardware_info.hpp"
 #include "hardware_interface/system_interface.hpp"
 #include "hardware_interface/types/hardware_interface_return_values.hpp"
-#include "hardware_interface/visibility_control.h"
 
 // UR stuff
 #include "ur_client_library/ur/ur_driver.h"